Portable self-cooking camp-stove.



No. 862,325. PATENTED AUG. 6, 1907, L. G. FAGERSTEN.

PORTABLE SELF COOKING CAMP STOVE. APPLIOATIOH rum; NOV. 1a, 1906.

fibzks'a-ay/ Q g I v z z "(*1 a 0 a LORENZO G. FAGERSTEN, OF CHICAGO, ILLINOIS.

PORTABLE SE LIE-COOKING CAlVIP-STOVE Specification of Letters Patent.

Patented Au 6, 1907.

Application filed November 13, 1906. Serial No. 343,221-

, To all whom it may concern:

My invention relates in general to culinary utensils and more particularly to a container for cooking previously,heated food by preventing the dissipation of the heat.

A device has heretofore been used known as a Russian hay stove comprising a wooden box filled with hay, asbestos, etc, into which a black iron boiling pot with a loose cover is placed after the food contained in the pot has been initially heated. The hay or asbestos acts as a sponge absorbing mechanically the aqueous vapor escaping from the pot. The hay in a measure prevcntsa too sudden loss of heat, and retains in the pot sufficient heat to cook the contents thereof,- buta long time is required as the heat rapidly falls below the boiling point of water. This device is ineflicient for several reasons. The wood has great absorbingpower for hea t and its reflecting power is almost nothing, while its radiating power is great. This is also true of the hay and especially of asbestos, which has great absorbing power, great conductivity and radiating power but no reflecting power. The black iron pot rapidly radiates the heat while the loose cover permits the rapid dissipation of the heat by allow-.

ing the steam to escape into the box.

The primary object of my invention is to provide a device of the type olthc so-called Russian hay stove, but which will avoid the objections thereto above men.-

tioned.

A further object of my invention is to provide a culinary device for containing initially heated food, which will effectively prevent the dissipation of the heat and thereby thoroughly cook the food by retaining I the initial heat.

A further object of my invention is to provide a container for cooking previously heated food which will degree of heat has been attained, a receptacle within which the sealed vessel is suspended, a removable cover for the receptacle from which the vessel depends, a lining made of polished metal within, but out of contact with the receptacle thereby forming an air space between the lining and receptacle, the space between the vessel and the lining being adapted to contain aqueous vapor formed by water placed above the cover of the vessel.

My invention will be more fully described hereinafter I p with reference to the accompanying drawing in which the same is illustrated as embodied in a convenient.

and practical form, and in which Figure l. is a central vertical sectional view; and Fig. 2 a view similar to Fig. l, the parts being shown as separated prior to inserting the vessel in the receptacle. I

The same reference characters are used to designate the same parts in the several figures of the drawings.

Reference character A designates a vessel made of any suitable material, such as iron and preferably coated with white enamel. The vessel is adapted to receive food and to be placed upon a stove while the food is being heated to a desired degree. The vessel A is provided with a shoulder a on the inner surface thereof a short distance below the upper edge, thereby leaving a flange 1 surroundingthe shoulder and of greater interior diameter than the shoulder.

13 designates a cover for the vessel-A and may be conveniently made of any suitable material, such as iron and is preferably coated-with white enamel Any suitable means may be provided For securing the cover 13 upon the shoulder a of the vessel A so as to hermetically seal-thc vessel. I have shown such means to consist in a rod B the ends oiwhich are adapted to be inserted through holes a, a through the flange A of the vessel at diametrically opposite points: A screw eye I) extends througha screw-threaded hole in the rod B and is adapted to engage the outer surface oi the cover 13 and to force the same downwardly so that its periphery will tightly engage a gasket b'supportcd upon the shoulder a, and thereby hermetically seal the vessel.

C designatcs a receptacle made of material having as little absorptive, radiating power, and heat condnctivity as possible, The receptacle may be conveniently made of chemically treated pulp compressed and preferably coated with shellac or my other subsl ance which will impart a surface capable of reflecting heat. The compressed pulp possess an advantage over wood in that it can be made air water and steam tight by pressure and proper sizing, and may be made at a small cost. The receptacle (1 is provided with suitable means [or carrying the same, such for instance as a bale C the ends oi which pivotally L-ngagc screw [looting power.

eyes 0, o" soourod to the receptacle on opposite sidos thoroof.

l7) dosignatos a lining for tho rocoptaolo (J Wllltll is made of polishod metal preferably tin plate, owing to its low absorbing and radiating powor and its grout re- The oxtorior tliztilltttl of tho lining D is loss than tho intorior dittmoior of tho rot-optaolo t; thoroby loaving a spa-(o lJotWooi-i tho lining: nnd roooptat-lo containing dry air. 'lho lining I) may ho oonvoniontly supportod ithin tho roooptaolo hy moans ot an outwardly projot-timr tlango around its uppor ond whirh tWorlios tho uppor odgo of tho roooptaolo and may ho soourotl thoroto liy suitahlo iastonint: do rioos suoh as sorows 1/" i E indioatos a oovor tor tho roooptaolo t be mado of tho fitl-lllt matorial. llLl-llitl oom 'trt-ssotl pulp. A lining r issoourotl t tho undor surt'aoo of tho covor E and is protorahly lllittll' ot' polisltotl motal suoh as tin plato. Tho undor surtaoo o1 tho oowr IQ is proforithly providod with a shouldor .-'o as to form a oontral portion oxtonding within tho ttppot' ond-ot' tho lining D and a latorallyprojootintr tluogo to ovorlio tho top ot tho roooptaolo. ll handlo. sot-h as l) is prol'orahly sot-urotl to tho oovor l) to portnit it to ho roatlily llkl-ll" dlod. A sorow hook o doponds from tho utulor-stn'l'aoo of tho oovor I and is ntlaptod to romox'ahly orig-ago .lit sorow oyo b on tho rod ll.

'lho inannor of using and oporat ion oi my invont ion are as follows: 'lho tootl whioh is to ho oookod is plaootl within the \ossol A nnd tho ooror allowotl to loosoly rost upon tho gaskot on tho shouldor t1. then plaood upon n. SltWo until tho dosirod dogroo ol hoat has boon impartod to thotood. hltt'll dogroo ooing ordinarily attainod whon tho hoilin; point of watt-r has hoon roaohotl. l'ol't'o tlto oovor l5 into tight ongagomont with tho gnskot b thorohy hormotioally soaling tho \ossol. 'lho vossol 'lho rust-l is is thou romovod from tho stove and insortod in tho ro 'eoptaolo which may ho oonvoniontly dono hy ongn-gingftho screw hook a on tho oovor l) with tho sot-ow eye I) thoreby permitting tho vossol to dopond from the (over and to he roadily plaood within tho roooptat-lo. When the v ssol has hoon plaood within tho roooptnclo tho oovor is supportod by its surrounding flange upon the top ol tho roooptaolo. 'lho woight oi the vosseliand its oontonts sorvos to koop tho oovor of thoroooptaolo in plaoo thoroon. Prior to insort in t ho vossol in the root-ptzu-lo 2L stint-ll quantity of wator, preferably hot, is pourod on tho top of tho oovor ll wit hin tho surrounding tlango Ai 'lhis wator, whon tho vossol is pltit'tttl within tho roooptaolo, sorvos to till tho split-o hotwoon tho oxtorior of tho vossol and tho intorior ot' tho lining l) with tlosirahlo :tqnoous \npon Hy thus supplying tho protooting onvolop ol'aquoons vapor from an indopondont sonroo, rathot' than trom tho intorior of tho \ossol, diroot loss of hoat from tho \ossol fund its oontonts is avoidod. ll dosirod at'tor tho \ossol hashoon hormotioally HtttlHl tho initinl ho-tt'ttlzt) ho raisod ahovo tho boiling point, ol' a'ntor .horohyAoonring tho moro thorough and rapid oooking of tho food altor it has hoon romovod from tho stovo and plat-ed within the roooptaolo.

l ronrtl -ahovo dosoription it will ho ohsorvod that .,my intpizovotl oontainor t'or t'oolcing proviously hoatod IlOOLl lH so oonotruotod 213 to roduoo to a minimum the whioh may 'lhooyosorowi1isthon rotatod so as to invontion.

dissipation of tho initial hoat. The parts comprising my tlevieo are mado of materials and are so treated as to eliminate as far as possihlo the absorption andradiation of the hont thorohy rotaining the heat within the yossol. Tho onamol ooating of the vessel and its cover products a rotlooting and non-boating radiating surtatos. tho aquoous vapor surrounding the vessel Within the lining of tho roooptaolo forms a protocting envelop whilo tho polished motal lining D does not radiate the hoat hut rotloots the same inwardly thereby confining it within the roooptaolo. The air space between the linin; and tho roooptaolo also sorvos as a'protecting onvolop whilo tho shollao or other coating on the ret'tplttt'lt produoos a non-radia. ng surface. The pulp of whit'h tho roooptaolo is fm'in'od also contributes towartts provont Eng tho hoat hoing oonduoted away from main on tho stove until tho hoiling point of water has.

ltttll roat-hod ai'tor whioh it may he placed within the roooptaolo and oomplotoly oookod. After the vessel has l oott plaood within tho roooptacle, the roeept'aole may ho strapped to the bolt of a hunter while he is tramping or to tho liolt of a soldior while on the march. [t is also of advantago as a household culinary utensil ;is it is not'ossat i' to Watoh the food only while it is brought to a boiling point after Wlti(l1 the cooking is romplototl without nood of attention. I

Whilo havo dosorihod more or loss procisoly the dot-ails ot' oonstruot ion. I do not wish to bo understood 21S limiting mysolt thoroto. as l oontomploto oliztngos in form, tho proportion of parts, and tho substitution of o uivalonts. as oiroumstanoo's may suggost, or rondor oxpotliont without dopartinf: from tho spirit; of my Ila-yin; now fully dosorihod my invontion, what I olaim as now and dosh-o to soouro hy liottors Patort is:

1 h. a oonlziinor for oooklng initially heated food. the

oomhinntion with a vessel in whloh th. food is initially hozttotL moons t'or hormotionlly sealing said vessel. and}! nonl: radiating roooptm-lo in which the vossel is intl m'ttl :tltor tho initinl hoatino; of the food. said vessel-and roooptaolo Iii-in ot' snoh rolntivo ms :is to form an intermotliato spaoo oontninin :tuuoons vapor.

.h In oontninor i'or oookiin: initialtfihoztted food. the t'mlihitizttioti with ussol possossing low hozit' radiating powor in whioh the food is initially hontotl. moans for hormotioally s h snitl \stl. :l non-hoot t'zuliniing o- \t ptut'lm sizos as to form an intorinotlinto spurt oontl-tining"itquoons \np l'. 1111'] W llis t'or Stifiptlltlllltl' ..ll(l \'ossol within sttitl rot'optztolo.

It, In a oontnin r t'or ttlttlilli;: initially hozttotl food. the ooinlin.-ttion with vossol puss ssing low hont powor in \rhioh tho food is initially hoatotl. n oovor for olosim: "till vossolv n non-hoot radiating roooptnolo in whioh snitl \'o.- is llltlUSl'tl nt'tor lh" initial heating of the food. sziitt ol :tlltl roooptuolo lioim: ot suoh rohttivo sizos 21 to form :1 spztoo'nronntl tho vessel oonluining n noons \'-'l[]tll','.'ll|tl :t lining havinglow hont radiating but high rollooting |tt)\\'tl'.\\'lllllll hut spztootl :tpnrt l'rolu said roooptnolo to form an air spnoo.

l4 lo oontztinor t'or oooking initially hontotl food, tho

.. id rossol :liltl rot-optuolo hoing ot' sin-h relative llO ceptacle to form an air space, a cover for saidleceptacle,

and means for suspending'said vessel from said cover.

oting-receptacle in which the vessel is inclgsed after the initial heating of the food, and a polished tin plate lining within and spaced apart from said receptacle to form an air space.

'6. In a container for cooking initially heated food, the combination with an enameled vessel in which the food is initially heated, means for hermetically sealing said .vessel, a receptacle composed of'pulp in which the vessel is inclosed after the initial heating of the food, and a polished tin plate lining within but spaced apart from said receptacle to form an air space.

7. In a container for cooking initially heated food, the combination with a vessel possessing low heat radiating power, a cover adapted .to rest iipon a shoulder below the top of said vessel thereby forming a space for containing water, means for securing said cover to the vessehto hermetically seal the latter, and a non-heat. radiating receptacle in which the vessel is inclosed after the initial heating of the food, said vessel and receptacle being; of such relative sizes as to form an intermediate space containing aqueous vapor generated by said water.

S. in a container for cooking" initially heated food, the combination with a' vessel possessing low heat radiating power, a cover adapted to rest upon a shoulder below the top of the vessel, a rod removably secured to the receptacle above said cover, a screw extending through said rod into contact with the cover, a receptacle in which the vessel is i'nclosed, a cover for said receptacle, and means for suspending said vessel from said cover.

9. In a container for cooking initially heated food, the

combination with a vessel in which the food is initially heated, means for hermetically sealing said vessel, a receptacle in which said vessel is inclosed after the initial heating of the food, said vessel and receptacle being of such relative sizes as to form an intermediate space, and a chamber within said receptacle containing water for supplying aqueous vapor between the vessel and receptacle.

10. In a container for cooking initially heated food, the combination with a vessel possessing low heat radiating power in which the food is initially heated, a cover'for closing said vessel, 21 non-heat radiating receptacle in which said vessel is inclosed after the initialheating of the food, said receptacle andyessel being of such relative sizes as to form an intermediate air space, means for suspending said vessel within said receptacle, said cover be ing located below the top of the vessel thereby. forming a chamber for containing water to supply aqueous vapor between the vessel and receptacle.

in testimony whereof, I sign this specification in the 4 presence 01' two witnesses.

, LORENZO G. FeGERS'lEN.

Witnesses Geo. L. WILKINSON, HARRY S Garrnnn. 

